Steam-boiler furnace.



No. 707,496. Pat ented Aug. 19, 19021 J. n. BAILEY.

v STEAM-BOILER FURNACE.

(Application filed Apr. 7, 1902.) I (No Mo deL) 2 Sheets-$het l.

anveni'oz No. 707,496. Patented Aug. I9, I902.

I J. R. BAILEY.

STEAM BOILER FURNACE. 'App1icafiion filed Apr. 7, 1902.

(No Model.) 2 Sheets-Sheei 2.

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ATENT OFFICE.

JOHN RICHARDSON BAILEY, OF BALTIMORE, MARYLAND, ASSIGNOR TO MAURICE LAUPHEIMER, OF BALTIMORE, MARYLAND.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 707,496, dated August 19, 1902.

Application filed April '7, 1902. $erial No. 101,817. (No model.)

To all whom, it may concern:

Be it known that 1, JOHN RICHARDSON BAILEY, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Steam-Boiler Furnaces, (Case B3) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces for steam-boilers; and it is intended to provide a furnace in which the carbon of the coal will be entirely consumed into car? bon dioxid, thus not only securing higher efficiency for the furnace, but also insuring such complete combustion that the furnace will be practically, if not entirely, smokeless.

A great deal of the smoke passing from fur-f naces is occasioned by the impact of the heated gases on the cool shell of the boiler before complete combustion of the fuel has been secured, thus causing a chilling of said gases and the deposit of carbon in the solid form, which carbon not being afterward ignited is carried up the smoke-stack in the form of smoke. This is not only wasteful of the fuel, but is especially objectionable in cities, where the smoke nuisance is a crying evil. I accomplish these ends by the structure that will be hereinafter described.

Reference is had to the accompanying drawings, in which the same parts are indicated by the same letters throughout both views.

Figure 1 represents a section through the furnace along the line 1 1 of Fig. 2. Fig. 2 represents a double section, the left half being along the line 2 2 of Fig. 1 and the right half being along the line 2 2 of Fig. 1. In this figure the boiler is shown not in section, but in end'elevation.

I have shown a horizontal tubular boiler as used in connection with the furnace, the said boiler being of the common well-known type; but any other form of boiler may be used, if desired.

Referring now to the drawings by letter, A represents the ash-pit, and B the grate, which may be of any ordinary or suitable type.

C represents the fire-box.

The ash-pit and fire-box have doors of any suitable construction a and c.

D represents the front bridge-wall, behind which the combustion-chamber E is situated.

This combustion-chamber has a floor, which is composed of two parts F and F, sloping toward each other and forming a step-down or shoulder f to arrest the flow of the gases. The point f is underneath the deflector G, which is in the-form of an arch, with the front face indented, asat g, to further arrest the gases. This arch extends between the side walls, and the deflector spans the space between the said Walls in the furnace below the crown h of the arch 1-1. This arch I-I touches the bottom of the boiler at its apex, and the space between the boiler and the arch is walled up in front, as shown at K, to permit the passage of part of the products of combustion above the arch H.

L is the rear bridge-wall, and M is the back connection.

N is the boiler, shown as a cylindrical fire tubular boiler; but, as before stated, this may be ofany desired type.

P is the front connection, terminatingin the uptake Q.

R is a pipe perforated on its rear face to deliver steam or air into the furnace. Suitable connections for said pipe to the boiler itself for steam and to any source of air-supply (not shown) would of course be provided. The steam is admitted when desired for the purpose of blowing the ashes out of the hearth or for creating a forced draft, if desired, and air may be admitted when the steam is not on for the purpose of promoting the combustion in the combustion-chamber E; but this pipe may be omitted, if desired. This pipe R is preferably partly inclosed in a recess in the rear face of the bridge-wall D, as shown in Fig. 1, to protect the metal of the pipe from the high heat of the furnace.

The products of combustion passing from the grate do not come directly in contact with the bottom of the boiler, being protected therefrom by an intermediate layer of more or less dead air, but pass into the combustionchamber E in the direction of the arrows. In this combustion-chamber the direction of highly-heated gases is deflected downward by the deflector G, and their motion is arrested somewhat, while at the same time the highly heated brick walls surrounding this combustion-chamber E prevent any chilling of the products of combustion, and the result is complete combustion of the carbon and a volume of smokeless and highly-heated gases which enter into the back connection M. The combustion being complete, little or no liberation of carbon occurs when the highlyheated gases enter the fire-tubes of the boiler,

and as a consequence the gases escaping from the front connection P and uptake Q are practically colorless.

In the construction of the fiat arch G, I preferably use fire-bricks of a large size and specially made for the purpose.

It will be obvious that various modifications might be made in the herein-described device which could be used without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

1.. In a steam-boiler furnace, the combination of a fuel-chamber, front and rear bridgewalls, a combustion-chamber between said walls provided with an inclined floor, an arch extending over said walls, a boiler located above said arch and contacting with its highest point, and a baffle-plate extending downwardly from about the center of said arch, said battle-plate being provided with recesses or pockets on its front projecting surface, substantially as described.

2. In a boiler-furnace, the .combination of a casing provided with a fuel-chamber near one end, front and rear bridge-walls, an arch extending completely over said bridge-walls and supported by the sides of the casing, a boiler extending over said fuel-chamber and touching said arch atits highest point, a wall or partition extending upwardly from the front of said arch and around the lower part of said boiler, and a baffle-plate extending downwardly from substantially the center of said arch and provided with recesses or hollows on its front face, substantially as do scribed.

3. In a boiler-furnace, the combination of a a casing, a fuel-chamber near one end thereof, front and rear bridge-walls, a double inclined floor extendingbetween said bridge-walls,one part of said floor being higher than the other so as to form a retarding-corner, an arch sprung from the side walls of said casing and extending over said bridge-walls, a boiler mounted in said casing and extending over said fuel-chamber and said arch and touching the highest point of said arch, a partition extending upwardly from the front of said arch and inclosing the lower part of said boiler, and a baffle-plate located near the center of said arch and extending downwardly, said baffie-plate being provided with hollows or recesses on its forward face and being located above the corner in the floor between said bridge-walls, substantially as described.

4:. In a boiler-furnace, the combination of a casing, a fuel-chamber near one end thereof, front and rear bridge-walls, a double inclined floor,extending between said bridge-walls,one part of said fioor being higher than the other so as to form a retarding-corner, an arch sprung from the side walls of said casing and extending over said bridge-walls, a boiler mounted in said casing and extending over said fuel-chamber and said arch and touching the highest point of said arch, a partition extending upwardly from the front of said arch and inclosing the lower part of said boiler, a baffie-plate located near the center of said arch and extending downwardly, said bafile-plate being provided with hollows or recesses on its forward face and beinglocated above the corner in the floor between said bridge-walls,and a perforated air-pipe located behind the front bridge-wall and adapted to supply air to the products of combustion after they have left the fuel-chamber,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN RICHARDSON BAILEY.

Witnesses:

FRANK D. BLAOKISTONE, FRED W. ENGLERT. 

